Blog
29 Nov 2011
johnmx writes:
Since I’m planning to build two bench power supplies, I needed to build a current load to test them. So, I’m going to show you my version of the dummy load. Please note that this project was built ONLY using existing parts in my personal stock. I had to be silly to put this project on a wood box, but it was the only box I found around. I don’t recommend you to do it, instead use plastic or metal cases. I wanted to build something simple but with a minimum protection circuit. Thus I added a control circuit to limit the maximum dissipation power to protect the main transistor.
The main specifications are as follows:
- Current regulation: 0 to 10A
- Maximum input voltage: 40V
- Maximum dissipation power: 100W (limiting circuit with warning LED)
- Analog control: 10 turn potentiometer
- Analog display: 10A ammeter
- External power: 12V/0.3A
- Enable/disable switch
- Fuse protected: 15A
Constant Current Dummy Load - [Link]
Leave a Reply
You must be logged in to post a comment.